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<h2><a href="closure_goog_dom_pattern_callback_callback.js.html">callback.js</a></h2>

<pre class="prettyprint lang-js">
<a name="line1"></a>// Licensed under the Apache License, Version 2.0 (the &quot;License&quot;);
<a name="line2"></a>// you may not use this file except in compliance with the License.
<a name="line3"></a>// You may obtain a copy of the License at
<a name="line4"></a>//
<a name="line5"></a>//     http://www.apache.org/licenses/LICENSE-2.0
<a name="line6"></a>//
<a name="line7"></a>// Unless required by applicable law or agreed to in writing, software
<a name="line8"></a>// distributed under the License is distributed on an &quot;AS IS&quot; BASIS,
<a name="line9"></a>// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
<a name="line10"></a>// See the License for the specific language governing permissions and
<a name="line11"></a>// limitations under the License.
<a name="line12"></a>
<a name="line13"></a>// Copyright 2007 Google Inc. All Rights Reserved.
<a name="line14"></a>
<a name="line15"></a>/**
<a name="line16"></a> * @fileoverview Useful callback functions for the DOM matcher.
<a name="line17"></a> *
<a name="line18"></a> */
<a name="line19"></a>
<a name="line20"></a>goog.provide(&#39;goog.dom.pattern.callback&#39;);
<a name="line21"></a>
<a name="line22"></a>goog.require(&#39;goog.dom&#39;);
<a name="line23"></a>goog.require(&#39;goog.dom.TagWalkType&#39;);
<a name="line24"></a>goog.require(&#39;goog.iter&#39;);
<a name="line25"></a>
<a name="line26"></a>
<a name="line27"></a>/**
<a name="line28"></a> * Callback function for use in {@link goog.dom.pattern.Matcher.addPattern}
<a name="line29"></a> * that removes the matched node from the tree.  Should be used in conjunciton
<a name="line30"></a> * with a {@link goog.dom.pattern.StartTag} pattern.
<a name="line31"></a> *
<a name="line32"></a> * @param {Node} node The node matched by the pattern.
<a name="line33"></a> * @param {goog.dom.TagIterator} position The position where the match
<a name="line34"></a> *     finished.
<a name="line35"></a> * @return {boolean} Returns true to indicate tree changes were made.
<a name="line36"></a> */
<a name="line37"></a>goog.dom.pattern.callback.removeNode = function(node, position) {
<a name="line38"></a>  // Find out which position would be next.
<a name="line39"></a>  position.setPosition(node, goog.dom.TagWalkType.END_TAG);
<a name="line40"></a>
<a name="line41"></a>  goog.iter.nextOrValue(position, null);
<a name="line42"></a>
<a name="line43"></a>  // Remove the node.
<a name="line44"></a>  goog.dom.removeNode(node);
<a name="line45"></a>
<a name="line46"></a>  // Correct for the depth change.
<a name="line47"></a>  position.depth -= 1;
<a name="line48"></a>
<a name="line49"></a>  // Indicate that we made position/tree changes.
<a name="line50"></a>  return true;
<a name="line51"></a>};
<a name="line52"></a>
<a name="line53"></a>
<a name="line54"></a>/**
<a name="line55"></a> * Callback function for use in {@link goog.dom.pattern.Matcher.addPattern}
<a name="line56"></a> * that removes the matched node from the tree and replaces it with its
<a name="line57"></a> * children.  Should be used in conjunction with a
<a name="line58"></a> * {@link goog.dom.pattern.StartTag} pattern.
<a name="line59"></a> *
<a name="line60"></a> * @param {Element} node The node matched by the pattern.
<a name="line61"></a> * @param {goog.dom.TagIterator} position The position where the match
<a name="line62"></a> *     finished.
<a name="line63"></a> * @return {boolean} Returns true to indicate tree changes were made.
<a name="line64"></a> */
<a name="line65"></a>goog.dom.pattern.callback.flattenElement = function(node, position) {
<a name="line66"></a>  // Find out which position would be next.
<a name="line67"></a>  position.setPosition(node, node.firstChild ?
<a name="line68"></a>      goog.dom.TagWalkType.START_TAG :
<a name="line69"></a>      goog.dom.TagWalkType.END_TAG);
<a name="line70"></a>
<a name="line71"></a>  goog.iter.nextOrValue(position, null);
<a name="line72"></a>
<a name="line73"></a>  // Flatten the node.
<a name="line74"></a>  goog.dom.flattenElement(node);
<a name="line75"></a>
<a name="line76"></a>  // Correct for the depth change.
<a name="line77"></a>  position.depth -= 1;
<a name="line78"></a>
<a name="line79"></a>  // Indicate that we made position/tree changes.
<a name="line80"></a>  return true;
<a name="line81"></a>};
</pre>


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